The NF-A9x14 PWM is a highly optimized, premium quality quiet fan that draws on pioneering aerodynamic design measures, such as Flow Acceleration Channels and Noctua's AAO-frame system. Thanks to a depth of only 14 mm, the NF-A9x14 is perfect for low-profile CPU cooler and require all other applications, the thinner fan. Noctua's novel PWM IC for fully automatic control and SSO2 reference-class bearings ensure superb quietness and outstanding long-term stability. Modular cabling, Low-Noise Adaptor surfaces the NF-A9x14 a premium solution for highest claims.